Waste pipe fitting



Aug. 20, 1935. H. J. LUFF WASTE VPIPE FITTING Filed Oct. 5, 1934 Fla-2 fINVENToR HENRY J. LUFF y F1a-4 J 2,011,721 YfY Patented Aug. 20, 1935 WASTE vPIPE 'FITTING f .-Applieationvoctober v5, 1934, .serial No. 747,020

V eolaims. (01.-137-75) "-This invention relatesto Waste pipe elbow fittingsfo'r employment in waste line plumbing in connection with plumbing xtures such as twat-er:closetsfandlthelike, l

I FIhef-standa'rd foutletfopeningof f such a fixture, lis-of greater lsize than necessary for the waste llin'leadin'g-therefrom. Y

`llurtl'ierfthe wasteline-Yleads'horizontally with- L'should -be' asy remote sbeneath the viix'ture loutlet,

tially uniform seetional area: forllow through the niitting, whereinY thelgeneralplarie of-the'finlet is lowerlthan'thenppermostf partV of l theoutlet ffl'he kex-actnatu're of-the inventionJ together with furth'erfobjectseandadvantages A `thereof 4will be apparentffrom the followingdescription' taken' in connection withl the -accompanying drawing, in

lthe invention ;-`iF-ig..2 \is atypical vertical section therethrough, indicatinginlbrokenrlines Athe natureof inlet connection to be employed in the embodinentfi-llnstrated; Fig. 3 is. an elevation in transverse section as in the plane of line 3 3,

1 is of metal, preferably brass or the like. It has inlet and outlet openings I and 2 respectively, disposedin planes at right angles to each other, so that the fitting has the general characteristics of a elbow. The inlet and outlet openings are circular and the inlet is of larger diameter than the out1etstandard dimensions at these points being four inches diameter for the inlet and three inches diameter for the outlet. The general plane of the inlet opening intersects the outlet opening; this plane is lower than the upper extremity of the outlet opening. The body of the'f'ltting generally indicated'at 3, thus includes a horizontal stretch generallyindicated at 4 and leading directly toward the outlet opening 2, the plane of the inlet opening I extending lengthwise Within this stretch 4.

Adjacent the inlet opening I the stretch 4 has stretch d, at its otherfend, adjacentthe outlet opening 2, is of circular section; 'Thus the width -its sideparts tangential to the inlet opening. jfI'he ofthe stretch T4 decreases frojrnlthe inlet opening `.I to theoutlet opening?. ,Owing to thellow ele- L vation oftheinlet Ii-with respect to thefoutlet opening, the fitting `ii'nrnediatelyadjacent the inlet'opening hasfle-ss,vertical'dimension in sectional `passage area thanat' its outletopeninglas indicated in Figs.- 2 Vand,3.,'Asindicated in'FigJZ, the bottomiof` `the vfitting' extends straightfwith a.

-curve from the outer-edgeof theinlet opening tangent tothe bottomof thestretch lLwhich in turn leads directly torthe outlet opening 2. 4Also, as'i'ndi'cated in. Fig1`2, atf-the-inside ofthe bend the*A stretch 4 at` its Vtop has4 a slopebin the.` zonef g leading generally :from Ythe `inlet opening elevai ltion -to that of the .top of the outlet opening; 1 The changeinwidth of the fitting; also',is'provided`in thiszonefas indicated inkFig. 1. Thus throughV 'ithezone 5 inthe direction of flow, the tting pro- -vi`desa passage area` of Adecreasing widthlbutinl creasing'. height. Whilek in f the manifold illusltrated thivszone lwherinthese changes of pro- -portions take place, is relatively: short and-.gent erally'adjacent` Athe inlet i opening.' I1 it will l'be appreciated. that-thezone might ihavelgreater so that fiow through the fitting may have constant Velocity substantially from entry into the inlet opening I to exit from the outlet opening 2.

The inlet opening illustrated is one adapted for connection employing a lead thimble 6 leading from the xture served by the fitting, and employing a wiped joint as indicated at 'I. Thus the fitting is here indicated as provided with a flange 8 annular about the inlet opening and merging, at the inside of the bend, with the upper wall part of the stretch 4. The upper face of the flange 8 is finished, the finish including theouter face of this upper wall part as indicated in Figs. 1 and 2. The inlet opening I also includes, when this type of joint is to be employed, a lip 9 extending slightly above the ilange 8, and finished outside.

It will be appreciated, however, that while theV eXtent,.u`p"ito, asfa maximum, the entire" length l -of`-the-stretch4- InanyeVent-theiproportion- :ing i. and 'arrangement-i-thatfis; I. the relation of width to heightin Vsection transverseltothe direction. of-iflow--isfsuch .thatlf the passagei area `fis Isubstantially constant throughout the'ifstretchlM 'Ihe manner of employment of the invention will be obvious to one, skilled in the art'and is illustrated conventionally inFig. 4, infwhich I represents a water closet supported on oor I Iy within which is located the Waste pipe iitting 3. The'tting 3 has connection with the fixture l0 `bya lead thimble 6, and at itsoutletendis ar-Y e iirst section I2 of the f.

-Yranged todeliver into th usual waste line. lWhile as illustrate adjacent theoutletop'ening 2, and its changeof sectional characteristics is confined to therela-A tively jshort zonez 5 radjacent the inlet openingfl,

it will be appreciated that the zone 5 might within the scope of -rnyvinvention be extended over substantially the entire length ofthe stretchd, leavingno substantial partof the stretch of cylindricalA section. The illustratedy form` is preferable; however, for service with thetype of' connection ,illustrated in Fig. 4, and also because it 'permits '.fshorteningof the'itting by trimming from its outletend,vrhennecessary.*uu f -=VV11atIclaimsr;y Y f lfina' waste pipe elbow fittinghaving a-'body Nwith' circular inlet and outletopenings, said 'body Y :includinga` stretclfi leading ztoward; said,r outlet Yopening,andj said'` inlet opening being vof' vgreater Y 1 ;diameter'than'gsaid'outlet peningand disposed Min a plane intersecting saidoutlet opening,` said '54,39 stretch -beingA-iiatterand wideradjaeent said met A,than-adjac ent saidoutlet openingfand the parts :beingisolkproportioned; thatA the passage areay for Viowthrough said'fiilttinggshall 'nowhere Ab Yless, pntlianC adjacent'said outlet-f opening- 1,V 7^

2. In a'lwaste pipeelbowfiittinghavingabody with circular inlet and'outletopenings; said body Lincluding ra, vstretch =leadingitoward-i said Q outlet l op'enihg', and said'inletjopeningbeing of vgreater Y diameter than; said :outlet opening, and"l disposed dit) Aa plane-fintersecting said outlet opening said i. stretch" y'adjacent -said inlet opening, Ahaving its iside 'parts tangential to 'the lattenand therebe-` -v tweenga-'part yleading f from 'said {inletjopening f in the plane thereof; said stretch*partsl being iso `prolciortioned ,thatV the` 'passage karea;V forfflow pi through'v said fitting shall` nowhere, b

Y' iiadjacent saidputlet opening.;l f

` f with circular inletandioutlet openings, 'said' body 50 A`including a stretch. Aleading :toward said :outlet opening,l and' said inlet openingbeing ofv greater diameter than saidl outlet` opening, and disposed Lyin al yplane extending* lengthwise within said stretch, said stretch adjacent said inlet opening, having its side parts tangential to the latter and therebetween a part leading from said inlet opening in the plane thereof, said stretch parts being so proportioned `that the passage area for yilovv through said tting Vshall nowhere increase with advance toward said outlet opening.

k4.V In a waste pipe elbow tting having a body .with 1circular,inlet andoutletopeningg'said body including a stretchy leading V/toward/'Asaid outlet opening, andfsaidfinlet 'opening being of greaterV rtlianfieter than said outlet opening and disposed "in a plane intersecting said outlet opening, said stretch being atter and Wider adjacent said inlet than i adjacent said outlet opening, the parts being so; proportioned that the passage area for flow'throughsaid fitting shall nowhere be less th'anadjacent said'outlet opening,

y said. stretch being continuously cylindrical throughout a zone adjacent said-joutletj opening and having its change in ysectional characteristic n. conned to-a'zonetoward the inlet fromsaid cy- -:lindricalzone. f

5.' In a waste pipe,'elbowffittinghaving ajfbody with circularv inlet andoutletopenings; said 'body ,i257

' including -af`stretchfleadingjoward said outlet opening, uand `saidzinlet opening ybeing of greater diameter thansaid outlet opening and disposed in a `plane intersectingV saidy outlet vopening A,said stretchbeing flatter and wideradjacent said inlet ,39 5 than adj acentsaidloutlet Vopeningthe parts` being so; proportionedV thatjV the passage 'ifarea' for 110W through vsaid ttingshall nowhere increase with' .advance toward'said ;-out1et0penir1s,-said 'stretch A being continuously cylindrical throughasubstan- 35 tial;l portion of, its j length adjacent 'said outlet l :lopeninsyan'd having its cha-neem SeCtiQnal Charl acteristic confined to a relatively short Zone adje.,- cent:saidinletopening g f 4 dj-Inagwaste pipeelbow tting having abody mwith circular'inlet andA outlet openings, `saidbody v-including a v stretch; leading towardL saidY outlet r-openinggand saidvinletopening being of ,greater diameterthan said outlet:openingfandy disposed in l `al plane.,.intersecting;said;v outlet opening-said ,545

`stretch adjacentits`inlet-opening,lhaving its1side parts tangentialgto the; latter and therebetweena part leadingyfrom said inlet opening in the plane 1 thereosaid body having anv annularY flangeabout said r inlet opening, saidl flange .merging in `stretch at theinsideof the-elbow.

1.10 Said y 

